Hi,
We use :ext and ssh for authentication on the HelixCommunity CVS server. We use a ssh key pair to complete the authentication between the client and server. We do not use pserver at all. Is it possible for you to add :ext (ssh) authentication to your crawler?
Our process is outlined here: https://common.helixcommunity.org/2004/devdocs/quickstart
Thanks, Rishi.